201101188 六、發明說明： 【發明所屬之技術領域】 本發明係主張關於2009年03月〇9日申請 號丄㈣⑻-謝簡之優先權與細年〇3月^日申請之韓國 專利案號10-2009-⑻20636之優先權。藉以弓丨用的方式併入本 文用作參考。 本發明是有種可傳送與魏—鱗射賴別卿D) 訊號的無線射頻識別收發裝置。201101188 VI. Description of the Invention: [Technical Field to Be Invented by the Invention] The present invention claims the Korean Patent No. 10-2009 on the application date of March, 2009, September 9th, 2009 (8) - Xie Jianzhi, and the fine year of March 2nd. - (8) 20636 priority. It is incorporated herein by reference in its entirety. The invention has a radio frequency identification transceiver capable of transmitting and transmitting signals with Wei-Square.
【先前技術】 目前’無料在正稍備衫營事以及產業的注 目。無所不在科技為-種不管錢者的位置或時間，皆可提供 相關内容與資訊給使用者的網路互動裝置世界的—種技術。 無所不在科技的-實例，即為無線射頻識別(rfid)技術， 其中將無㈣馳術引人前交Μ最具代表性的例子。 【發明内容】 本發明之揭露為提供-種可自動調整介於無線射頻識別 讀取器（RFID reader)與天線之間之電壓駐波比（v〇itage Standing Wave Ratio, VSWR)的無線射頻識別收發裝置。 於一些實施例中，本發明提供一種無線射頻識別收發裝 置，該無線射頻識別收發裝置可控制介於天線與無線射頻識 別讀取器之間的連接端埠的一阻抗，進而有效控制該讀取 器之一輸出損失(output loss)，並且自動控制源自反射波特性 之相位改變所造成的一標籤身分(ID)前置錯誤(preamble err〇r) 201101188 產生部分的相位(phase)，以調整識別率降低之現象。 於此所描述的說明並非用以限制本發明的範圍，且其 他未描述的問題亦可從以下描述中，被熟習該技藝人士所 清楚理解。 減本發般考量’―難騎賴敝發裝置的 特點為：—天線、—指向輕合H (diireetivity ·Ρ㈣、-電壓駐 波比(VSWR)摘測器、一電壓駐波比控制器以及一相位/阻抗控 制器。指向编合器輸出從該天線所輸人的—前進波訊號 ㈣gressive wave signal)以及從該天線所反射的一反射波訊 號；電壓駐航_ ϋ _該前進波訊號與該反射波訊號去偵 測電壓駐波比，電壓駐波比控制器控制回應該電壓駐波比的 一電壓駐波比特性；相位/阻抗控繼_該被控制的電壓駐 波比特性以調整一相位與一阻抗。 於一些實施例中，該無線射頻識別收發裝置可進一步包含 利用從該指向搞合器所輸出的—訊號則貞測—電壓駐波比標 〇準轉的—鮮訊賴_，缝絲線射賴職發裝置; 、，i訊號處理器，該主訊號處理器輸出各別從電壓 γ皮比偵勒與;^準訊號彳貞測器所輸人的該電壓駐波比與該 電壓駐波比標準訊號至該電壓駐波比控制器。 於一些實施例中，該電塵駐波比控制器利用所細的該電 壓駐波比與該電壓駐波比標準訊號去控制該電壓駐波比 ^ 性H其巾該妹/略控㈣機介賊輯與該 射頻識別讀取器之間的一相位以及一阻抗。 、、' 4 201101188 於一些實施例中，該電壓駐波比偵測器债測基於下文方程 式1的該電壓駐波比，且當該電壓駐波比接近方程式1時，一 傳輸線阻抗與一端阻抗為完全匹配，以防止一入射波被反射並 允許所有的該入射波通過。 方程式1 : 電壓駐波比(VSWR) = (1+丨p|)/(i- |p丨） 其中，P為一反射係數。 於—些實施例中，該相位/阻抗控制器調整該相位以及該 阻抗以調整該反射係數，進而自動調整該電壓駐波比以迎合環 境的需求。 ▲本發明利用安裝-頻帶(band)控制，而可根據環境自 動調整介於—無線射頻識別讀取器與-天線之_-電壓駐 波比’進岐善麟__收發裝置的—接收靈敏度以及 用補償一輸出以降低功率消耗。 ❹ 鱼一2明可根據環境自動調整介於—無線射頻識別讀取器 Ϊ置的^間的—€壓駐波比’以有效控制鱗射頻識別收發 且，本發_自_整於_ ㈣-部份，並 標籤辨識率以及利用補償ψ '…駐波比特性以改善該 【實施方式】 輪出崎低功率消耗。 為讓本發明之上述目 配合圖式將本發明相關實 明起見，眾所皆知的功能、 的、特徵和特點能更_易僅，兹 施例詳細說明如下。其甲，為了簡 奴態或結構之細節便省略，以避免 5 201101188 不必要的細節模糊了本發明。進一步地，於圖式說明中，相同 的參考符號將對應至同樣的元件。 請參閱圖1，圖1為根據本發明一實施例說明無線射頻 識別收發裝置的控制方塊示意圖。 如圖1所示，根據本發明的無線射頻識別（Radio Frequency Identification，RFID)收發裝置可包含一天線 1〇〇、一 相位/阻抗控制器200、一指向轉合器(directivity coupler)300、 一電壓駐波比(VSWR)镇測器400以及一電壓駐波比控制器 〇 500。 天線100接收被輸入至一無線射頻識別讀取器（处仍 reader)的一接收訊號並傳送由該無線射頻識別讀取器所輸出 的一傳輸訊號。 指向耦合器300相互連繫於該天線1〇〇與該無線射頻識別 讀取器之間，以耗合用以監測一射頻訊號而被輸入至該天線 100的一前進波訊號(progressive wave signal)以及由該天線100 〇 所反射的一反射波訊號及輸出該前進波訊號與該反射波訊號。 電壓駐波比偵測器400利用輪出至指向耦合器300的該前 進波訊號以及該反射波訊號以債測一電壓駐波比(VSWR)。 在電子通訊(telecommunication)，一駐波比(SWR)為於一 電子傳輸線中，在波腹（最大值）之一部份駐波的一振幅 (amplitude)至一相鄰節點(最小值)之振幅的比率。該駐波比通 吊被疋義成一電壓比率而稱作電塵駐波比(V〇ltage standing Wave Ratio, VSWR) 〇 6 201101188 例如：於具有二個不同阻抗之二個媒體(media)中的前進 波’由於阻抗不匹配而被分為一正向波(forward wave)與一反 射波(reflected wave)，在此情況下，於該二波之間的一差異 便是所謂的電壓駐波比。假如該反射係數被定義為p，則可經 由以下的方程式1計算該電壓駐波比。 方程式1: VSWR= (1 + |p| ) / (1 . |p| ) 也就是說’例如’該電壓駐波比之數值為12:1，則表 ° 示一最大駐波振幅為1.2倍大於最小駐波之數值。另一例 為，該電壓駐波比之數值丨，則表示一傳輸線阻抗與一端阻 抗為完全匹配以允許所有入射波通過，並且假若該電壓駐 波比之數值大於1 ’則表示反射較多的人射波，使得該電壓 駐波比成為判斷一天線是否運作得宜的一重要指標。 如圖2所示，該電壓駐波比偵測器彻可利用比較根據 無線射頻識別讀取器之一輸出控制的一標準訊號A以及 ❹根據-天線100阻抗與-外部反射波的的一阻抗變化B，以债 測介於天線1G0與-無線射頻識別讀取器·之間的該電壓 駐波比。 鑲電壓駐波比控制 μ工們签对琢電壓駐波比偵; 器所偵測之該電餘波比的一電壓駐波比特性，並且. 配置於-類比電路(anak)gue eimiit)。相錄抗㈣器· 用被控制的該縣駐波比概，去難介於 頻識別讀取器700之間的一相位與 …”、& 201101188 圖3a至圖3c為說明圖i相位/阻抗控制器的相位控制方 法。 如圖3a所示，可注意的是，該相位與電源水平會因為 介於無線射頻識別讀取器700與天線1〇〇之間的反射波的產生 而改變。 圖3b說明當相位/阻抗控制器控制該相位在4〇%的一相 位波形，以及圖3c說明當相位/阻抗控制器控制該相位在9〇0/〇 的一相位波形。 圖4為根據本發明另一實施例說明無線射頻識別收發裝 置的功能方塊示意圖，其中如同圖1，圖4無線射頻識別收 發裝置的相同運作將於說明中省略。 請參閱圖4，電壓駐波比偵測器4〇〇可包含一射頻偵測 器（RF deteCtor)410、一類比數位轉換器(AD c〇nverter)42()以及 一訊號處理器430。 射頻偵測器410偵測從指向耦合器3〇〇所輸出的一射頻訊 ❹ 號脈衝。一般而言’無線射頻通訊利用幅移鍵控(Amplitude Shift Keying，ASK)調變方法，使得如圖4所示，運用射頻偵測 器410以識別一傳輸指令訊號而助於從無線射頻識別讀取器 700的指令辨識，藉以鍰和傳輸/接收狀態的轉換。 如圖5所示，圖5為根據本發明一實施例說明圖2射頻 偵測器所偵測之訊號波形的示意圖。 訊號處理器430執行方程式1的運算以計算一電壓駐波 比，其中所計算的該電壓駐波比被輸入至一主訊號處理器8〇〇 8 201101188 内。根據本發明的無線射頻識別收發裝置<進一步包含一標準 訊號偵測器600,該標準訊號偵測器600利用從指向耗合器300 所輸出之一訊號，以偵測一電壓駐波比標準訊號。 如圖4所示，標準訊號偵測器600可包含一對數偵測器 (log detector)610、一放大器（amplifier)620以及一類比數位轉換 器(AD converter)630來運作。由標準訊號偵測器600所確認的 該電壓駐波比標準訊號被輸入至該主訊號處理器800。 主訊號處理器800輸出分別由電壓駐波比偵測器400以及 © 標準訊號偵測器600所輸入的該電壓駐波比與電壓駐波比標 準訊號至電壓駐波比控制器5〇〇，其中電壓駐波比控制器5〇〇 控制該特性，使得被偵測的該電壓駐波比與電壓駐波比標準訊 號匹配。 圖6為根據本發明一實施例說明無線射頻識別收發裝置 的電壓駐波比特性的示意圖。 〇 如圖4所說明’電壓駐波比控制器5〇〇可包含一射頻偵測 器510、-訊號處理器520以及一類比數位轉換器53〇。、 阻抗控制器調整介於天線議以及無線射頻識 制器所控制賴紅錄=^以_電壓駐波比控 可根據被控制_ = = = =制一 ==器=駐波比根據環境而自動被調整。該 訊號轉換成—數位訊號。、^射頻偵洌器510所偵測的一類比 9 201101188 圖7為根據本發明一實施例說明由無線射頻識別收發裳 置所傳送的訊號波形的示意圖。 如圖7所繪示，為了防止一高於例如：30dBm (1W)的傳輸 訊號進入一接收端，該相位/阻抗控制器200可控制該相位與 阻抗以調整該反射係數，使得該傳輸訊號可被反射。進一步 地，如圖7所示的詢問回應(query response)與標籤反相散射訊 號(tag backscattering signal)可被改變成接收狀態以及在一標 籤身分前置區段（ID preamble section)被相位校正，該相位校 〇 正藉以經由因該反射波訊號而以反相輸入的標藏身分前置訊 號所產生的一錯誤之區段的該讀取器的一相位轉換器來執行。 圖8為根據本發明一實施例說明安裝有頻率頻帶模組之 無線射頻識別收發裝置的功能方塊示意圖。 請參閱圖8，無線射頻識別收發裝置可包含能夠發射與接 收不同頻率頻帶訊號的一多頻帶(multi_band)天線900，例如： 一大約 900MHz 至一大約 2GHz 的超高頻(Ultra High Frequency， ◎ UHF)頻帶。 進一步地，不同於圖8所示，根據本發明的無線射頻識別 收發裝置可安裝有能夠發射與接收相互不同頻率頻帶訊號的 複數個天線，亦即，能夠發射與接收9〇OMHz頻率頻帶訊號的 一第一天線，以及能夠發射與接收大約2GHz頻率頻帶訊號的 一第二天線。 如圖8所示，根據本發明的無線射頻識別收發裴置可包 含能夠於無線射頻識別讀取器94〇中自動調整該電壓駐波比 201101188 的複數個頻帶控制模組(910，920，930)。 例如：第一頻帶控制模組91〇可自動調整經由一多頻 帶天線900所發射與接收的不同頻率寬帶訊號中之該第一 頻帶訊號的一電壓駐波比，第二頻帶控制模組920可自動調 整經由一多頻帶天線9〇〇所發射與接收的不同頻率寬帶訊 號中之該第二頻帶訊號的一電壓駐波比，以及一第η個頻帶 控制模組930可自動調整經由一多頻帶天線9〇〇所發射與 接收的不同頻率寬帶訊號中之一第η個頻帶訊號的一電壓 ❹駐波比。 根據本發明裝設於無線射頻識別收發裝置上之每一複 數個頻帶控制模組(910，920，930)的構造與運作，係相同 於那些圖1至7所描述的頻識別收發裝置。 亦即’第一至第η個控制模組(910，920，930)的每— 個可包含如圖1所描述的該相位/阻抗控制器2〇〇、該指向輕 合器300、該電壓駐波比偵測器400以及該電壓駐波比控制器 Ο 500，並可進一步包含除了圖4中所描述的組成元件以外的 標準訊號偵測器600以及該主訊號處理器800。 根據本發明裝設於無線射頻識別收發裝置上之複數個 頻帶控制模組的數量係相同於由多頻帶天線900所發射與 接收的訊號頻帶之數量。 舉例而言：於一例中，多頻帶天線900發射與接收 900MHz與2GHz頻率頻帶訊號，該無線射頻識別收發襄置可 包含自動調整900MHz頻率頻帶之一電壓駐波比的第一頻帶 11 201101188 控制模組910，以及自動調整2GHz頻率頻帶之一電壓駐波比 的第二頻帶控制模組920。 進一步地，於一例中，該無線射頻識別收發裝置組裝有 複數個傳送與接收頻帶訊號的天線，複數個天線中的每一天線 可連接至對應一相關頻帶的一頻帶控制模組。舉例而言：於 一例中，該無線射頻識別收發裝置安裝有一發射與接收 900MHz頻率頻帶訊號的一第一天線，以及發射與接收一大約 ❹ 2GHz頻率頻帶訊號的一第二天線，自動調整900MHz頻率頻 ▼之該電壓駐波比的該第一頻帶控制模組910可連接至該第 一天線，以及自動調整2(}112頻率頻帶之該電壓駐波比的該第 二頻帶控制模組920可連接至該第二天線。 本發明之產業利用性在於： 以實際的觀點，一反射波以及一阻抗不匹配之產生， 係根據―讀取器、一天線以及於無線射頻識別(RFID)現場安 置期間待辨識的一物體，從而產生一讀取器輸出減少的部份， ❹基於反射特性的標籤相位改變所造成的一辨識率降低，該無線 射頻識別收發裝置可利用控制於該讀取H與該天線之-連接 端埠的一阻抗，有效管理讀取器的輸出損失，使得該辨識率降 2之現象可利用自動控制基於該反射波特性之該相位改變所 仏成一標籤身分前置錯誤之一部分的相位得以被調整。 综上所述，乃僅記载本發明為呈現解決問題所採用的 技術手焱之較佳實施方式或實施例而已，並非用來限定本 X專利實知之範圍。即凡與本發明專利申請範圍文義相 12 201101188 符，或依本發明專利範圍所做的均等變化與修飾，皆為本 發明專利範圍所涵蓋。 【圖式簡單說明】 圖1為根據本發明一實施例說明無線射頻識別收發裝置的控 制方塊示意圖； 圖2為說明圖1電壓駐波比偵測器的電壓駐波比偵測方法的示 意圖； ❹圖3a至圖3c為說明圖1相位/阻抗控制器的相位控制方法； 圖4為根據本發明另一實施例說明無線射頻識別收發裝置的 功能方塊示意圖； 圖5為根據本發明一實施例說明圖2射頻價測器所偵測之訊號 波形的示意圖； 圖6為根據本發明-實關說明無線射_職發裝置的電 壓駐波比特性的示意圖； 圖7為根據本發明—實施例域線射麵別收發|置所 〇 傳送的訊號波形的示意圖；以及 圖8為根據本發明一實施例說明安裝有頻率頻帶模紐之叙 射頻識別收發裝置的功能方塊示意圖。 …、線 【主要元件符號說明】 100 天線 200 相位/阻抗控制器 300 指向搞合器 400 電壓駐波比偵測器 13 201101188[Previous technology] At present, there is no expectation in the preparation of the shirt business and the industry. Ubiquitous technology is a technology that provides relevant content and information to users in the world of online interactive devices regardless of the location or time of the money. The ubiquitous technology-example is the radio frequency identification (RFID) technology, which will be the most representative example of the introduction of the four. SUMMARY OF THE INVENTION The present invention is directed to providing a radio frequency identification that automatically adjusts a voltage standing wave ratio (VSWR) between a radio frequency identification reader (RFID reader) and an antenna. Transceiver. In some embodiments, the present invention provides a radio frequency identification transceiver device that can control an impedance between a connection terminal between an antenna and a radio frequency identification reader, thereby effectively controlling the reading. One of the output loss, and automatically controls a phase identity (ID) pre-error caused by the phase change of the reflected wave characteristic (preamble err〇r) 201101188 to generate the phase of the part, Adjust the phenomenon that the recognition rate is reduced. The descriptions herein are not intended to limit the scope of the invention, and other problems that are not described are also apparent from the following description. The characteristics of the reduction of the hair--the difficulty of riding the Lai hair device are: - antenna, - pointing light H (diireetivity · Ρ (four), - voltage standing wave ratio (VSWR) finder, a voltage standing wave ratio controller and a phase/impedance controller that points to the combiner's output of the progressive wave signal from the antenna and a reflected wave signal reflected from the antenna; voltage voyage _ _ _ the forward wave signal and The reflected wave signal detects a voltage standing wave ratio, and the voltage standing wave ratio controller controls a voltage standing wave ratio characteristic of the voltage standing wave ratio; the phase/impedance control follows the controlled voltage standing wave ratio characteristic to adjust One phase and one impedance. In some embodiments, the radio frequency identification transceiver device may further include: using the signal output from the pointing device, the signal is measured, the voltage standing wave ratio is quasi-rotated, and the sewing wire is smashed. The device, the i-signal processor, the main signal processor outputs the voltage gamma ratio and the voltage standing wave ratio standard of the input voltage from the voltage gamma ratio detector; Signal to the voltage standing wave ratio controller. In some embodiments, the electric dust standing wave ratio controller uses the voltage standing wave ratio and the voltage standing wave ratio standard signal to control the voltage standing wave ratio, and the wiper/slight control (four) machine A phase between the thief and the RFID reader and an impedance. , 4 201101188 In some embodiments, the voltage standing wave ratio detector is based on the voltage standing wave ratio of Equation 1 below, and when the voltage standing wave ratio is close to Equation 1, a transmission line impedance and one end impedance For perfect matching, to prevent an incident wave from being reflected and allowing all of the incident wave to pass. Equation 1: Voltage standing wave ratio (VSWR) = (1+丨p|)/(i- |p丨) where P is a reflection coefficient. In some embodiments, the phase/impedance controller adjusts the phase and the impedance to adjust the reflection coefficient to automatically adjust the voltage standing wave ratio to meet the environmental requirements. ▲The invention utilizes the installation-band control, and can automatically adjust the receiving sensitivity of the _-voltage standing wave ratio of the radio frequency identification reader and the antenna according to the environment. And use an offset to reduce power consumption. The squid 1-2 can automatically adjust the 驻 standing wave ratio between the 无线 无线 无线 以 以 以 以 以 以 以 以 以 以 以 以 以 无线 无线 无线 无线 无线 无线 无线 无线 无线 无线 无线 无线 无线 无线 无线 无线 无线 无线 无线 无线 无线 无线 无线 无线 无线 无线- Partial, and label identification rate and the use of compensation ψ '... standing wave ratio characteristics to improve the [Embodiment] low output power consumption. The functions, features, and characteristics of the present invention will become more apparent from the foregoing description of the invention. Its A, omitted for the sake of simplicity or structural details, to avoid 5 201101188 unnecessary details obscures the present invention. Further, in the drawings, the same reference numerals will be given to the same elements. Please refer to FIG. 1. FIG. 1 is a block diagram showing the control of a radio frequency identification transceiver device according to an embodiment of the invention. As shown in FIG. 1 , a radio frequency identification (RFID) transceiver device according to the present invention may include an antenna 1 , a phase/impedance controller 200 , a directivity coupler 300 , and a Voltage standing wave ratio (VSWR) detector 400 and a voltage standing wave ratio controller 〇 500. The antenna 100 receives a received signal input to a radio frequency identification reader (still reader) and transmits a transmission signal output by the radio frequency identification reader. The pointing coupler 300 is coupled between the antenna 1 and the RFID reader to consume a progressive wave signal input to the antenna 100 for monitoring an RF signal and A reflected wave signal reflected by the antenna 100 and outputs the forward wave signal and the reflected wave signal. The voltage standing wave ratio detector 400 utilizes the forward wave signal that is rotated out to the coupler 300 and the reflected wave signal to measure a voltage standing wave ratio (VSWR). In telecommunication, a standing wave ratio (SWR) is an amplitude of a standing wave in one part of the antinode (maximum) to an adjacent node (minimum) in an electron transmission line. The ratio of the amplitude. The standing wave ratio is called a voltage standing wave ratio (VSWR) 〇6 201101188, for example, in two media with two different impedances. The forward wave 'is divided into a forward wave and a reflected wave due to impedance mismatch. In this case, a difference between the two waves is the so-called voltage standing wave ratio. . If the reflection coefficient is defined as p, the voltage standing wave ratio can be calculated by Equation 1 below. Equation 1: VSWR= (1 + |p| ) / (1 . |p| ) That is, for example, if the voltage standing wave ratio is 12:1, the table shows a maximum standing wave amplitude of 1.2 times. Greater than the value of the minimum standing wave. In another example, the value of the voltage standing wave ratio 丨 indicates that a transmission line impedance is exactly matched with one end impedance to allow all incident waves to pass, and if the voltage standing wave ratio is greater than 1 ', it means that the reflection is more The radio wave makes the voltage standing wave ratio an important indicator for judging whether an antenna is functioning properly. As shown in FIG. 2, the voltage standing wave ratio detector can utilize a standard signal A that is controlled according to one of the output of the RFID reader, and an impedance of the impedance of the antenna 100 and the external reflected wave. Change B to measure the voltage standing wave ratio between the antenna 1G0 and the -radio frequency identification reader. The voltage standing wave ratio control is set to the voltage standing wave ratio characteristic of the voltage residual wave ratio detected by the device, and is configured in an analog circuit (anak) gue eimiit). Recording anti-(four) device · With the controlled standing wave ratio of the county, it is difficult to get a phase between the frequency identification reader 700 and...", & 201101188 Figure 3a to Figure 3c illustrate the phase of the diagram i / Phase Control Method of Impedance Controller As shown in Figure 3a, it can be noted that this phase and power level will change due to the generation of reflected waves between the RFID reader 700 and the antenna 1〇〇. Figure 3b illustrates a phase waveform when the phase/impedance controller controls the phase at 4〇%, and Figure 3c illustrates a phase waveform when the phase/impedance controller controls the phase at 9〇0/〇. Another embodiment of the invention illustrates a functional block diagram of a radio frequency identification transceiver device, wherein the same operation of the radio frequency identification transceiver device of FIG. 4 will be omitted from the description as shown in FIG. 1. Referring to FIG. 4, the voltage standing wave ratio detector 4 The radio frequency detector (RF deteCtor) 410, an analog converter (AD c〇nverter) 42 () and a signal processor 430. The radio frequency detector 410 detects the slave coupler 3 Output of a radio frequency signal pulse In general, 'radio frequency communication uses Amplitude Shift Keying (ASK) modulation method, so that as shown in FIG. 4, the radio frequency detector 410 is used to identify a transmission command signal to facilitate reading from the radio frequency identification. The instruction of the extractor 700 is recognized by the 锾 and the transmission/reception state. As shown in FIG. 5, FIG. 5 is a schematic diagram showing the signal waveform detected by the RF detector of FIG. 2 according to an embodiment of the invention. The 430 performs the operation of Equation 1 to calculate a voltage standing wave ratio, wherein the calculated voltage standing wave ratio is input to a main signal processor 8 8 201101188. The radio frequency identification transceiver according to the present invention < Further comprising a standard signal detector 600, the standard signal detector 600 uses a signal output from the pointing consumulator 300 to detect a voltage standing wave ratio standard signal. As shown in FIG. 4, the standard signal detector The detector 600 can include a log detector 610, an amplifier 620, and an analog converter 630 to operate. It is confirmed by the standard signal detector 600. The voltage standing wave ratio standard signal is input to the main signal processor 800. The main signal processor 800 outputs the voltage standing wave ratio and voltage input by the voltage standing wave ratio detector 400 and the standard signal detector 600, respectively. The standing wave ratio standard signal to the voltage standing wave ratio controller 5〇〇, wherein the voltage standing wave ratio controller 5〇〇 controls the characteristic so that the detected standing wave ratio is matched with the voltage standing wave ratio standard signal. 6 is a schematic diagram illustrating voltage standing wave ratio characteristics of a radio frequency identification transceiver device according to an embodiment of the invention.电压 As shown in FIG. 4, the voltage standing wave ratio controller 5A may include a radio frequency detector 510, a signal processor 520, and an analog-to-digital converter 53A. The impedance controller is adjusted between the antenna and the radio frequency controller to control the red register = ^ to _ voltage standing wave ratio control can be controlled according to the control _ = = = = one == device = standing wave ratio is automatically according to the environment Adjustment. The signal is converted into a digital signal. An analogy detected by the radio frequency detector 510. 9 201101188 FIG. 7 is a schematic diagram illustrating a signal waveform transmitted by a radio frequency identification transceiver according to an embodiment of the invention. As shown in FIG. 7, in order to prevent a transmission signal higher than, for example, 30 dBm (1 W) from entering a receiving end, the phase/impedance controller 200 can control the phase and impedance to adjust the reflection coefficient so that the transmission signal can be Reflected. Further, the query response and the tag backscattering signal as shown in FIG. 7 can be changed to the receiving state and the phase correction is performed in a label preamble section. The phase calibration is performed by a phase converter of the reader via an erroneous section of the identifiable preamble signal that is input in anti-phase by the reflected wave signal. FIG. 8 is a functional block diagram showing a radio frequency identification transceiver device with a frequency band module installed according to an embodiment of the invention. Referring to FIG. 8, the RFID device may include a multi-band antenna 900 capable of transmitting and receiving signals of different frequency bands, for example: an ultra high frequency (UHF High Frequency, ◎ UHF) of about 900 MHz to about 2 GHz. )frequency band. Further, different from FIG. 8, the radio frequency identification transceiver device according to the present invention may be installed with a plurality of antennas capable of transmitting and receiving mutually different frequency band signals, that is, capable of transmitting and receiving signals of a frequency band of 9 〇 O MHz. A first antenna and a second antenna capable of transmitting and receiving signals of a frequency band of approximately 2 GHz. As shown in FIG. 8, the radio frequency identification transceiver device according to the present invention may include a plurality of frequency band control modules (910, 920, 930) capable of automatically adjusting the voltage standing wave ratio 201101188 in the radio frequency identification reader 94A. ). For example, the first frequency band control module 91 can automatically adjust a voltage standing wave ratio of the first frequency band signal in different frequency broadband signals transmitted and received via a multi-band antenna 900, and the second frequency band control module 920 can Automatically adjusting a voltage standing wave ratio of the second frequency band signal of different frequency broadband signals transmitted and received via a multi-band antenna 9〇〇, and an n-th frequency band control module 930 can automatically adjust via a multi-band The antenna 〇〇 standing wave ratio of the n-th frequency band signal of the different frequency broadband signals transmitted and received by the antenna 9 。. Each of the plurality of frequency band control modules (910, 920, 930) mounted on the radio frequency identification transceiver device in accordance with the present invention is constructed and operated in the same manner as the frequency identification transceiver devices described in Figures 1 through 7. That is, each of the first to nth control modules (910, 920, 930) may include the phase/impedance controller 2, as described in FIG. 1, the pointing lighter 300, the voltage The standing wave ratio detector 400 and the voltage standing wave ratio controller Ο 500 may further include a standard signal detector 600 and the main signal processor 800 in addition to the constituent elements described in FIG. The number of frequency band control modules mounted on the radio frequency identification transceiver in accordance with the present invention is the same as the number of signal bands transmitted and received by the multi-band antenna 900. For example, in one example, the multi-band antenna 900 transmits and receives 900 MHz and 2 GHz frequency band signals, and the radio frequency identification transceiver can include a first frequency band that automatically adjusts a voltage standing wave ratio of one of the 900 MHz frequency bands. Group 910, and a second band control module 920 that automatically adjusts the voltage standing wave ratio of one of the 2 GHz frequency bands. Further, in one example, the radio frequency identification transceiver device is equipped with a plurality of antennas for transmitting and receiving frequency band signals, and each of the plurality of antennas can be connected to a band control module corresponding to an associated frequency band. For example, in one example, the RFID device is equipped with a first antenna for transmitting and receiving a 900 MHz frequency band signal, and a second antenna for transmitting and receiving a frequency band of approximately GHz 2 GHz, which is automatically adjusted. The first frequency band control module 910 of the voltage standing wave ratio of the 900 MHz frequency band can be connected to the first antenna, and the second frequency band control mode of the voltage standing wave ratio of the 2 (}112 frequency band is automatically adjusted. The group 920 can be connected to the second antenna. The industrial applicability of the present invention lies in: From a practical point of view, a reflected wave and an impedance mismatch are generated according to a "reader, an antenna, and a radio frequency identification ( RFID) an object to be identified during field placement, thereby generating a reduced portion of the reader output, and a recognition rate reduction caused by a change in the label phase based on the reflection characteristic, the radio frequency identification transceiver device being controllable by the Reading an impedance of H and the connection terminal 该 of the antenna, effectively managing the output loss of the reader, so that the phenomenon that the recognition rate is decreased by 2 can be automatically controlled based on the The phase change of the reflected wave characteristic is adjusted to the phase of a part of the labeling error. In summary, only the preferred embodiment of the technical handcuffs used to solve the problem is described. Or, the scope of the invention is not limited to the scope of the invention, which is the scope of the invention, and the equivalent variation and modification according to the scope of the patent application of the invention is in the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the control of a radio frequency identification transceiver device according to an embodiment of the invention; FIG. 2 is a diagram illustrating a method for detecting a voltage standing wave ratio of the voltage standing wave ratio detector of FIG. 3a to 3c are diagrams illustrating a phase control method of the phase/impedance controller of FIG. 1. FIG. 4 is a functional block diagram illustrating a radio frequency identification transceiver apparatus according to another embodiment of the present invention; FIG. 1 is a schematic diagram of a signal waveform detected by the RF detector of FIG. 2. FIG. 6 is a diagram illustrating the power of a wireless radio_service device according to the present invention. FIG. 7 is a schematic diagram of a signal waveform transmitted by a field line surface transceiving device according to an embodiment of the present invention; and FIG. 8 is a diagram illustrating a frequency band mode installed according to an embodiment of the present invention. Functional block diagram of the radio frequency identification transceiver of New Zealand. ..., line [main component symbol description] 100 antenna 200 phase / impedance controller 300 pointing to the adapter 400 voltage standing wave ratio detector 13 201101188
410 射頻偵測器 420 類比數位轉換器 430 訊號處理器 500 電壓駐波比控制器 510 射頻偵測器 520 訊號處理器 530 類比數位轉換器 600 標準訊號偵測器 610 對數偵測器 620 放大器 630 類比數位轉換器 700 無線射頻識別讀取器 800 主訊號處理器 900 多頻帶天線 910 第一頻帶控制模組 920 第二頻帶控制模組 930 第η個頻帶控制模組 940 無線射頻識別讀取器 A 標準訊號 B 阻抗變化 14410 RF Detector 420 Analog-to-Digital Converter 430 Signal Processor 500 Voltage Standing Wave Ratio Controller 510 RF Detector 520 Signal Processor 530 Analog Digital Converter 600 Standard Signal Detector 610 Logarithmic Detector 620 Amplifier 630 Analog Digital Converter 700 Radio Frequency Identification Reader 800 Main Signal Processor 900 Multi-Band Antenna 910 First Band Control Module 920 Second Band Control Module 930 Nth Band Control Module 940 Radio Frequency Identification Reader A Standard Signal B impedance change 14